<template>
  <div>
    <div class="crumbs">
      <el-breadcrumb separator="/">
        <el-breadcrumb-item><i class="el-icon-lx-calendar"></i> 表单</el-breadcrumb-item>
        <el-breadcrumb-item>图片上传</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <div class="container">
      <div class="content-title">支持拖拽</div>
      <div class="plugins-tips">
        Element UI自带上传组件。
        访问地址：<a
          href="http://element.eleme.io/#/zh-CN/component/upload"
          target="_blank"
        >Element UI Upload</a>
      </div>
      <el-upload
        class="upload-demo"
        drag
        action="http://jsonplaceholder.typicode.com/api/posts/"
        multiple
      >
        <i class="el-icon-upload"></i>
        <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
        <div
          class="el-upload__tip"
          slot="tip"
        >只能上传jpg/png文件，且不超过500kb</div>
      </el-upload>
      <div class="content-title">支持裁剪</div>
      <div class="plugins-tips">
        vue-cropperjs：一个封装了 cropperjs 的 Vue 组件。
        访问地址：<a
          href="https://github.com/Agontuk/vue-cropperjs"
          target="_blank"
        >vue-cropperjs</a>
      </div>
      <div class="crop-demo">
        <img
          :src="cropImg"
          class="pre-img"
        >
        <div class="crop-demo-btn">选择图片
          <input
            class="crop-input"
            type="file"
            name="image"
            accept="image/*"
            @change="setImage"
          />
        </div>
      </div>

      <el-dialog
        title="裁剪图片"
        :visible.sync="dialogVisible"
        width="30%"
      >
        <vue-cropper
          ref='cropper'
          :src="imgSrc"
          :ready="cropImage"
          :zoom="cropImage"
          :cropmove="cropImage"
          style="width:100%;height:300px;"
        ></vue-cropper>
        <span
          slot="footer"
          class="dialog-footer"
        >
          <el-button @click="cancelCrop">取 消</el-button>
          <el-button
            type="primary"
            @click="dialogVisible = false"
          >确 定</el-button>
        </span>
      </el-dialog>
    </div>
  </div>
</template>

<script>
import VueCropper from 'vue-cropperjs';
export default {
    name: 'upload',
    data: function () {
        return {
            defaultSrc: require('../../assets/img/img.jpg'),
            fileList: [],
            imgSrc: '',
            cropImg: '',
            dialogVisible: false
        };
    },
    components: {
        VueCropper
    },
    methods: {
        setImage(e) {
            const file = e.target.files[0];
            if (!file.type.includes('image/')) {
                return;
            }
            const reader = new FileReader();
            reader.onload = (event) => {
                this.dialogVisible = true;
                this.imgSrc = event.target.result;
                this.$refs.cropper && this.$refs.cropper.replace(event.target.result);
            };
            reader.readAsDataURL(file);
        },
        cropImage() {
            this.cropImg = this.$refs.cropper.getCroppedCanvas().toDataURL();
        },
        cancelCrop() {
            this.dialogVisible = false;
            this.cropImg = this.defaultSrc;
        },
        imageuploaded(res) {},
        handleError() {
            this.$notify.error({
                title: '上传失败',
                message: '图片上传接口上传失败，可更改为自己的服务器接口'
            });
        }
    },
    created() {
        this.cropImg = this.defaultSrc;
    }
};
</script>

<style scoped>
.content-title {
    font-weight: 400;
    line-height: 50px;
    margin: 10px 0;
    font-size: 22px;
    color: #1f2f3d;
}
.pre-img {
    width: 100px;
    height: 100px;
    background: #f8f8f8;
    border: 1px solid #eee;
    border-radius: 5px;
}
.crop-demo {
    display: flex;
    align-items: flex-end;
}
.crop-demo-btn {
    position: relative;
    width: 100px;
    height: 40px;
    line-height: 40px;
    padding: 0 20px;
    margin-left: 30px;
    background-color: #409eff;
    color: #fff;
    font-size: 14px;
    border-radius: 4px;
    box-sizing: border-box;
}
.crop-input {
    position: absolute;
    width: 100px;
    height: 40px;
    left: 0;
    top: 0;
    opacity: 0;
    cursor: pointer;
}
</style>